RE: [fluka-discuss]: RE: Delta-ray production

From: Senger, Anna Dr. <A.Senger_at_gsi.de>
Date: Fri, 14 Mar 2014 15:00:46 +0000

Thank you

Best regards
Anna

-----Original Message-----
From: Alfredo Ferrari [mailto:alfredo.ferrari_at_cern.ch]
Sent: Freitag, 14. März 2014 15:59
To: Senger, Anna Dr.
Cc: 'fluka-discuss_at_fluka.org'
Subject: RE: [fluka-discuss]: RE: Delta-ray production

Dear Anna

the problem with EM-DISSO is due to one of your materials, STAHLA, having more than 80 isotopes in between all elements.
Apparently you are the first user with more than 80 isotopes in a single material, the problem will be solved in a respin possibly next week where the relavent dimensions will be increased.

                Ciao
               Alfredo


+----------------------------------------------------------------------+
| Alfredo Ferrari || Tel.: +41.22.76.76119 |
| CERN-EN/STI || Fax.: +41.22.76.69474 |
| 1211 Geneva 23 || e-mail: Alfredo.Ferrari_at_cern.ch |
| Switzerland || |
+----------------------------------------------------------------------+

On Fri, 14 Mar 2014, Senger, Anna Dr. wrote:

> Dear Alfredo.
> I removed big part of my geometry, in particular high-dense volumes, and LAM-BIAS.
> And now I can get at least 30 events (30 Au ions). I wait more statistics.
> I think the problem with EM-DISSO due to high particle multiplicity.
> It is possible to solve this problem?
>
> Best regards
> Anna
>
> -----Original Message-----
> From: Alfredo Ferrari [mailto:alfredo.ferrari_at_cern.ch]
> Sent: Montag, 10. März 2014 14:14
> To: Senger, Anna Dr.
> Cc: 'alfredo.ferrari_at_cern.ch'; 'fluka-discuss_at_fluka.org'
> Subject: RE: [fluka-discuss]: RE: Delta-ray production
>
> Dear Anna
>
> what(1) should be 2.0 rather than 4.0 since for your problem you are interested in both target and projectile dissociation. I am puzzled by the rror you report, apparently you have a compound with more than 80 elements which I do not believe... could you please send you input file?
>
> Thanks
> Alfredo
>
>
> +----------------------------------------------------------------------+
> | Alfredo Ferrari || Tel.: +41.22.76.76119 |
> | CERN-EN/STI || Fax.: +41.22.76.69474 |
> | 1211 Geneva 23 || e-mail: Alfredo.Ferrari_at_cern.ch |
> | Switzerland || |
> +----------------------------------------------------------------------+
>
> On Mon, 10 Mar 2014, Senger, Anna Dr. wrote:
>
>> Dear Alfredo.
>> I used
>>
>> PHYSICS 4. EM-DISSO
>>
>> but my job crashed with error:
>>
>> "Subscript out of range on file line 227, procedure xeldis.f/xeldis.
>> Attempt to access the 81-th element of variable izelds."
>>
>> Best regards
>> Anna
>>
>> -----Original Message-----
>> From: Alfredo Ferrari [mailto:alfredo.ferrari_at_cern.ch]
>> Sent: Montag, 10. März 2014 10:44
>> To: Senger, Anna Dr.
>> Cc: 'fluka-discuss_at_fluka.org'; Alfredo.Ferrari_at_cern.ch
>> Subject: Re: [fluka-discuss]: RE: Delta-ray production
>>
>> Dear Anna
>>
>> surely it would be better to use the PRECISIOn default for your specific problem and to activate explicitly for the Au-Au case both ElectroMagnetic dissociation and heavy ion direct pair production (look at the PHYSICS card for both).
>>
>> The "step" that you see in the electron spectrum for the Au-Au case is likely due to the different weigth of two components, a) the delta-rays emitted by the ions, whose end-point is exactly where you see the "step"
>> as you can compute yourself, and b) the e-e+ coming from pi0 production and gamma conversion or anyway more in general from nuclear interactions.
>>
>> Both components exist for p-Au too, but the delta-ray component
>> scales like Z^2 (79^2) while the nuclear component scales with
>> something like
>> A^2/3 -> ergo for the p-Au case the delta-ray component is much
>> smaller in a relative sense
>>
>> Ciao
>> Alfredo
>>
>> +----------------------------------------------------------------------+
>> | Alfredo Ferrari || Tel.: +41.22.76.76119 |
>> | CERN-EN/STI || Fax.: +41.22.76.69474 |
>> | 1211 Geneva 23 || e-mail: Alfredo.Ferrari_at_cern.ch |
>> | Switzerland || |
>> +----------------------------------------------------------------------+
>>
>> On Mon, 10 Mar 2014, Senger, Anna Dr. wrote:
>>
>>>
>>> Dear FLUKA experts.
>>>
>>> My question is rather important for CBM detector and electronics
>>> development. We found, that after 60 cm C absorber the ionizing
>>> energy loss due to electrons from the target is very high for 35
>>> AGeV gold beam. We try to understand, it is realistic or not. I
>>> produced usrtrack-plot for electrons in 1mm from the target for Au and p beams.
>>> There is one step in the distribution for Au beam. Is it correct?
>>> And were all possible processes of the delta-electron production included for the Au beam for "NEW-DEFA"
>>> option?
>>>
>>>  
>>>
>>> Best regards
>>>
>>> Anna Senger
>>>
>>>  
>>>
>>> From: owner-fluka-discuss_at_mi.infn.it
>>> [mailto:owner-fluka-discuss_at_mi.infn.it]
>>> On Behalf Of Senger, Anna Dr.
>>> Sent: Mittwoch, 5. März 2014 14:25
>>> To: 'fluka-discuss_at_fluka.org'
>>> Subject: [fluka-discuss]: Delta-ray production
>>>
>>>  
>>>
>>> Dear FLUKA experts,
>>>
>>> I have a question about delta-ray production in target. I simulate
>>> Au beam _at_
>>> 35 AGeV, and I have 1% gold target.
>>>
>>> If I use "default" settings, is form factor included in delta-ray
>>> production in target?
>>>
>>>  
>>>
>>> Best regards
>>>
>>> Anna Senger
>>>
>>>
>>>
>>
>
Received on Fri Mar 14 2014 - 16:52:07 CET